二、代码实现：
（1）基础版（控制台调试）：
car类：
package com.xiaoyao.car;
import java.util.List;
public class Car{
private int id;//租车序号
private int typeId;//租车分类下的序号
private String name;//租车名字
private double price;//租车单价
private int personLoad;//载客量；
private double goodsLoad;//载货量；
private List<Car> carList;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getTypeId() {
return typeId;
}
public void setTypeId(int typeId) {
this.typeId = typeId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public int getPersonLoad() {
return personLoad;
}
public void setPersonLoad(int personLoad) {
this.personLoad = personLoad;
}
public double getGoodsLoad() {
return goodsLoad;
}
public void setGoodsLoad(double goodsLoad) {
this.goodsLoad = goodsLoad;
}
public List<Car> getCarList() {
return carList;
}
public void setCarList(List<Car> carList) {
this.carList = carList;
}
}carWithPerson类：
package com.xiaoyao.car;
import java.util.List;
public class CarWithPerson extends Car {
private List<CarWithPerson> personCarList;
public CarWithPerson(int id, int typeId, String carName, double carPrice,int withPerson) {
// TODO Auto-generated constructor stub
super.setId(id);
super.setTypeId(typeId);
super.setName(carName);
super.setPrice(carPrice);
super.setPersonLoad(withPerson);
}
public List<CarWithPerson> getPersonCarList() {
return personCarList;
}
public void setPersonCarList(List<CarWithPerson> personCarList) {
this.personCarList = personCarList;
}
}carWithGoods类：
package com.xiaoyao.car;
import java.util.List;
public class CarWithGoods extends Car {
private List<CarWithGoods> goodsCarList;
public CarWithGoods(int id, int typeId, String carName, double carPrice, double withGoods) {
// TODO Auto-generated constructor stub
super.setId(id);
super.setTypeId(typeId);
super.setName(carName);
super.setPrice(carPrice);
super.setGoodsLoad(withGoods);
}
public List<CarWithGoods> getGoodsCarList() {
return goodsCarList;
}
public void setGoodsCarList(List<CarWithGoods> goodsCarList) {
this.goodsCarList = goodsCarList;
}
}carWithPersonAndGoods类：
package com.xiaoyao.car;
import java.util.List;
public class CarWithGoods extends Car {
private List<CarWithGoods> goodsCarList;
public CarWithGoods(int id, int typeId, String carName, double carPrice, double withGoods) {
// TODO Auto-generated constructor stub
super.setId(id);
super.setTypeId(typeId);
super.setName(carName);
super.setPrice(carPrice);
super.setGoodsLoad(withGoods);
}
public List<CarWithGoods> getGoodsCarList() {
return goodsCarList;
}
public void setGoodsCarList(List<CarWithGoods> goodsCarList) {
this.goodsCarList = goodsCarList;
}
}test类
package com.xiaoyao.car;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Scanner;
public class test extends Car {
public static void main(String[] args) {
// 问答：
Scanner sc = new Scanner(System.in);
System.out.println("欢迎使用租车系统，您是否要租车？");
System.out.println("是：请输入1；否：请输入0；");
int num = sc.nextInt();
if (num != 1) {
System.out.println("欢迎下次光临");
System.exit(0);
} else {
}
// 输入租车时间：
System.out.println("请输入租车天数");
int days = sc.nextInt();
// 选择车辆类型：
System.out.println("请选择车辆类型：0:全部显示；1：载人车；2：载货车；3：皮卡车；");
int carType = sc.nextInt();
// 输出可租车信息：
System.out.println("您可租车的类型及其价目表：");
System.out.println("序号 汽车名称 租金 容量");
// 录入车辆信息：
LinkedList<CarWithPerson> personCar = new LinkedList<CarWithPerson>();
LinkedList<CarWithGoods> goodsCar = new LinkedList<CarWithGoods>();
LinkedList<CarWithPersonAndGoods> personAndGoodsCar = new LinkedList<CarWithPersonAndGoods>();
LinkedList<Car> cars = new LinkedList<Car>();
CarWithPerson personCar1 = new CarWithPerson(1, 1, "奥迪A4", 500.0, 4),
personCar2 = new CarWithPerson(2, 2,"马自达6", 400.0, 4),
personCar3 = new CarWithPerson(3, 3,"金龙", 800.0, 20);
CarWithGoods freightCar1 = new CarWithGoods(4, 1,"松花江", 400.0, 4.0),
freightCar2 = new CarWithGoods(5, 2,"依维河", 1000.0, 20.0);
CarWithPersonAndGoods personAndFreightCar1 = new CarWithPersonAndGoods(6, 1,"皮卡雪6", 450.0, 4, 2.0);
goodsCar.add(freightCar1);
goodsCar.add(freightCar2);
personCar.add(personCar1);
personCar.add(personCar2);
personCar.add(personCar3);
personAndGoodsCar.add(personAndFreightCar1);
cars.addAll(personCar);
cars.addAll(goodsCar);
cars.addAll(personAndGoodsCar);
int carsNumber = cars.size();
int goodsCarNumber = goodsCar.size();
int personCarNumber = personCar.size();
int personAndGoodsCarNumber = personAndGoodsCar.size();
//展示车辆
switch (carType) {
case 0:
// 全部展示：
System.out.println("共有" + carsNumber + "辆可租车");
for (int i = 0; i < carsNumber; i++) {
Car allCar = cars.get(i);
System.out.println(allCar.getId()+ ". " + " " + allCar.getName() + " " + allCar.getPrice() + "元/天 " + allCar.getPersonLoad() + "人 " + allCar.getGoodsLoad()+"吨 ");
}
System.out.println("请选择车辆序号：");
int carId = sc.nextInt();
int thereId = carId-1;
System.out.println("请输入租车数量：");
int number = sc.nextInt();
System.out.println("订单");
System.out.println("车辆：" + cars.get(thereId).getName()+ "\n数量：" + number + "辆；\n单价：" + cars.get(thereId).getPrice() + "元/天；\n天数：" + days+"天； \n总载货："+ cars.get(thereId).getGoodsLoad()*number + "吨 \n总载人： "+cars.get(thereId).getPersonLoad()*number+"人");
System.out.println("合计总价："+cars.get(thereId).getPrice()*days*number + "元。");
break;
case 1:
//展示载客车：
System.out.println("共有" + personCarNumber + "辆载客车");
for (int i = 0; i < personCarNumber; i++) {
Car allCar = cars.get(i);
System.out.println((allCar.getId())+ ".\t" +allCar.getName() + "\t\t" + allCar.getPrice() + "元/天 \t" + allCar.getPersonLoad() + "人 \t ");
}
System.out.println("请选择车辆序号：");
int carId1 = sc.nextInt();
int thereId1 = carId1-1;
System.out.println("请输入租车数量：");
int number1 = sc.nextInt();
System.out.println("订单");
System.out.println("车辆：" + cars.get(thereId1).getName()+ "\n数量：" + number1 + "辆；\n单价：" + cars.get(thereId1).getPrice() + "元/天；\n天数：" + days+"天； \n总载人："+cars.get(thereId1).getPersonLoad()*number1+"人");
System.out.println("合计总价："+cars.get(thereId1).getPrice()*days*number1 + "元。");
break;
case 2:
// 展示载货车：
System.out.println("共有" + goodsCarNumber + "辆载货车");
for (int i = personCarNumber; i < goodsCarNumber+personCarNumber; i++) {
Car allCar = cars.get(i);
System.out.println((allCar.getId()-personCarNumber)+ ".\t" +allCar.getName() + "\t\t" + allCar.getPrice() + "元/天 \t" + allCar.getGoodsLoad() + "吨 \t ");
}
System.out.println("请选择车辆序号：");
int carId2 = sc.nextInt();
int thereId2 = carId2-1+personCarNumber;
System.out.println("请输入租车数量：");
int number2 = sc.nextInt();
System.out.println("订单");
System.out.println("车辆：" + cars.get(thereId2).getName()+ "\n数量：" + number2 + "辆；\n单价：" + cars.get(thereId2).getPrice() + "元/天；\n天数：" + days+"天； \n总载货："+ cars.get(thereId2).getGoodsLoad()*number2 + "吨 \t ");
System.out.println("合计总价："+cars.get(thereId2).getPrice()*days*number2 + "元。");
break;
case 3:
// 展示皮卡车：
System.out.println("共有" + personAndGoodsCarNumber + "辆皮卡车");
for (int i = goodsCarNumber+personCarNumber; i < personCarNumber+goodsCarNumber+personAndGoodsCarNumber; i++) {
Car allCar = cars.get(i);
System.out.println((allCar.getId()-goodsCarNumber-personCarNumber)+ ".\t" +allCar.getName() + "\t\t" + allCar.getPrice() + "元/天 \t" + allCar.getPersonLoad() + "人 \t "+ allCar.getGoodsLoad() + "吨 \t ");
}
System.out.println("请选择车辆序号：");
int carId3 = sc.nextInt();
int thereId3 = carId3-1+personCarNumber+goodsCarNumber;
System.out.println("请输入租车数量：");
int number3 = sc.nextInt();
System.out.println("订单");
System.out.println("车辆：" + cars.get(thereId3).getName()+ "\n数量：" + number3 + "辆；\n单价：" + cars.get(thereId3).getPrice() + "元/天；\n时间：" + days+"天； \n总载人："+cars.get(thereId3).getPersonLoad()*number3+"人； \n总载货："+cars.get(thereId3).getGoodsLoad()*number3+"吨；");
System.out.println("合计总价："+cars.get(thereId3).getPrice()*days*number3 + "元。");
break;
default:
System.out.println("请正确输入指令：1 or 2 or 3");
}
}
}结果展示：
全部车：
分类展示车：
（2）修改版（页面展示）：